Joint-fastener.



T. GARLSON.

JOINT FASTBNBR.

APPLIGATION 11,111) 1mm, 1911.

Patented 001.31, 1911.

: snares earner rates.

roan CABLSON, or Jamnsrown, New roiex.

JGINT-FASTENER Specification of amusement. yam m n e, 31, 11911,

Application filed February 6, 1911. Serial 2210. $08,776.

To all whom it may concern:

Be it known thatI, TUBE CARLsoma sub 'ject of the King of Sweden, residing at Jamestown, in the county of Chautauqua and State of New York,-have invented new bolted together, usually with a bolt running through the length of the same, thereby making a cumbersome piece of furniture; and the invention consists in the construction and arrangement of the device as shown in this specification and the accompanying drawings, and pointed out in the claims.

In the drawings Figure 1 is a side elevation of a pedestal table with the lower portion of the pedestal in section showing the improved tubular fastening to hold the parts of the pedestal, its base and the supporting portion together. Fig. 2 is a plan view of the blank for the tubular fastening. Fig. 3 is an elevation of the tubular fastening bent up from the blank shown in Fig. 2. Fig. 4 is a perspective view of the plug for spreading the slotted and pointed end of the tubular fastening. Fig. 5 is a plan View of the upper end of the tubular fastening. Fig. 6 is an elevation of the contracted end of the tubular fastening after being spread by the plug and Fig. 7 is a similar view of the contracted end with the plug within the same to expand the same, as when driven into the hole in the parts to be joined.

Like numerals of reference refer to corresponding parts in the several views.

The numeral 10 designates the pedestal of a table, the numeral 11 the base block for the same, and the numeral 12 the spreading base or support for the lower end of the pedestal 10 and the numeral 13 the table top. Such table supports are usually joined by means of a rod or bolts running lengthwise through the pedestal 10, base block 11 and base 12, in order to firmly unitethese parts. The improved .fastening for these parts consists of a tubular connection or fastening, formed of sheet metal, the blank being stamped out as shown in Fig. 2, with points 14 on one end, and cuts 15 there- 'between, so that the points 14 may be spread apart and extend out radially in return bends when the main body portion '16 is bent into the tubular form. The other end is cut with a plurality of points 17, preferably longer. than points 15, and a number of points 18 are struck from the sheet metal and extend at right' angles thereto as shown in Figs. 1 3 6 and 7, to

engage the sides of the hole 19 in the pedestal or other piece to be joined. The sheet metal blank 16 is bent by means of suitable dies into the tubular form, as shown in Fig. 3, with the points 14 extending the length of the cuts 15 radially from the end of the body portionof the sheet metal tube 16, and the points 14 are then turned at right angles to the part 15 and parallel to the body portion 16, as shown in Figs. 1 3 and 5, so that said points 14 maybe driven into the wood around the mouth of the hole 19,

and so that the part 15 will brace against the wood adjacent to said mouth. The points 17 are bent toward one another until their pointed ends come together, as shown in Fig. 3. The length of the projecting points 18 on said points 17 should be so proportioned that when the points 17 are brought together, points 18 will be inside of a perpendicular line along the body 16, so that said points may freely enter the hole 19. It is now apparent that the tubular fastening may be inserted in the hole 19 in two or more ieces which it is desired to join, and the points 14 driven into the wood around the mouth of said hole. A plug 20, which is fitted to the tubular opening within the fastening, is then inserted within the said tubular fastening and riven to the inner end of the same, thereby pressing out the contracted points 17 and pressing the points 18 into the sides of the hole, thereby firmly securing the inner end of the tubular fastening within the hole 19, and firmly securing the parts'together. The points 1 7 may be turned outward as shownat 17 but they are not as strong as points 18.

It is obvious that the tubular fastening is light, cheap and exceedingly strong, and when once inserted as hereinbefore described, can not be removed, making it extremely difiicult to separate the joined parts, objects, which are greatly de ired in t e manufacture of furniture. It is also a parent that the tubular fastening may used wherever the parts to be joined permit of the mouth of the hole and the parts 15 being placed out of sight, either behind or within the piece of furniture, of which construction the hereinbefore described pedestal is an illustration.

I claim as new:

1. A joint fastener comprising a sheet of metal bent in tubular form, one end of the tubular fastener having V-shaped notches therein to form points which are bent toward one another, outwardly extending points struck from the sheet metal of the contracted portion of the tubular fastener, aplug for expanding said contracted portion, and means for attachingthe opposite end of the tubular fastener to the surrounding material.

2. A joint fastener comprising a sheet metal tube, a series of points around one end of said tube having slots between the same and given outward return bends, the

memes other end of said tube havin V-shaped notches and pointed portions tfierebetween contracted to a point, outwardly projecting points struck from the sheet metal of the said pointed ortion of said tube, substantially as and or the purpose specified. 3. A joint fastener composed of an expansible sheet metal tube, a'plurality of points cut from the sheet metal on each end of said tube, said oints at one end of said tube given a re ial outward and a return bend, said points at the other end of said tube contracted together, lateral points extending outwardly on said contracted points, and a plug to expand said contracted points and press said lateral points into the surrounding material. 7

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

- TUBE CARLSON. Witnesses:

H. U. HARRIS, A. L. FURLow. 

